نتایج جستجو برای: thiuram sulphides
تعداد نتایج: 606 فیلتر نتایج به سال:
With increasing demand for mineral resources, extraction of polymetallic sulphides at hydrothermal vents, cobalt-rich ferromanganese crusts at seamounts, and polymetallic nodules on abyssal plains may be imminent. Here, we shortly introduce ecosystem characteristics of mining areas, report on recent mining developments, and identify potential stress and disturbances created by mining. We analyz...
The Ok Tedi Complex hosts a world-class porphyry copper-gold deposit. Samples from the Ok Tedi Complex and the neighbouring Mount Ian Complex were analyzed for major and trace elements using XRF and HR-ICP-MS, and the isotopic composition of S in sulphides was analyzed by Elemental Analyzer. Major element geochemistry indicates that both complexes are alkaline and contain rocks ranging in compo...
We present an in-depth first-principles study of the lattice dynamics of the tin sulphides SnS2, Pnma and π-cubic SnS and Sn2S3. An analysis of the harmonic phonon dispersion and vibrational density of states reveals phonon bandgaps between low- and high-frequency modes consisting of Sn and S motion, respectively, and evidences a bond-strength hierarchy in the low-dimensional SnS2, Pnma SnS and...
This study simulates the hydrothermal conditions that existed on carbonaceous chondrite planetesimals in early solar system. Our experiments are relevant to alteration CV parent body and late stage oxidizing of CM chondrites. We conducted 11 using chips CO3 Kainsaz. Water was added each chip sealed separate Teflon reaction vessels for 175 days. Samples were altered at different initial water-to...
Styrene-butadiene (SBR) and acrylonitrile-butadiene (NBR) rubber blends with tetramethyl thiuram disulfide (TMTD) monosulfide (TMTS) accelerators environmentally friendly plasticizers, obtained from PET recycling biobased resources (LA/PG/PET/EG/LA), were prepared. The mechanical properties of the products tested compared those commercial dioctyl terephthalate (DOTP). TMTS was prepared by simpl...
Kauçuk, hem doğal yollarla elde edilen, de petrol ve alkolün bileşiminden suni olarak edilebilen bir malzeme olup üzerine belirli kuvvet uygulanıp bırakıldığında eski konumuna dönen malzemeler için kullanılan terimdir. Kauçuk yapısal yapışkanlık içermektedir ancak vulkanizasyon prosesi ile azaltılıp, kuvvetli mekanik değerlere sahip olmaktadır. Vulkanizasyon en metot olan kükürt çok tercih edil...
Background and aim: Eczema is a common inflammatory skin disease. Although history and physical examination are important in diagnosis of allergen, because of extent of environmental allergens, those are not simply recognized. The objective of this study was to determine allergens in patients with contact or atopic dermatitis referred to Razi hospital.Materials and Meth...
Background and aim: Eczema is a common inflammatory skin disease. Although history and physical examination are important in diagnosis of allergen, because of extent of environmental allergens, those are not simply recognized. The objective of this study was to determine allergens in patients with contact or atopic dermatitis referred to Razi hospital.Materials and Meth...
The ABS2 sulphides (A=Cu, or Ag), B=As, Sb, Bi) are a naturally occurring group of minerals, typically found in polymetallic vein deposits. Behind chemically simple, the minerals have a complex structure and undergo several temperature/composition phase transitions. In this study, synchrotron radiation is used to collect Ag, As, Bi, Cu, Cd, Hg and Sb K-edge EXAFS data from a series of synthetic...
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